Patent CZ-302977-B6 (CZ)
Title: Device for dispensing fluid, method for keeping the fluid under pressure and pressure cartridge for use in the device and use thereof
Inventor: VLOOSWIJK JOHANNES JACOBUS THOMAS
IPC: B65D83/36
Filed: 1999-03-16
Abstract: The present invention relates to a device (1, 101, 201, 301) for dispensing a fluid, comprising a container (2, 102, 202, 302) having a first compartment (4, 104, 204, 304), and a second compartment (16, 116, 216, 316), the first compartment (4, 104, 204, 304) being arranged for receiving the fluid (3) to be dispensed, and the second compartment (16, 116, 216, 316) being arranged for receiving a propellant, while, at least during use, an opening (19) is provided between the first and the second compartment (4, 104, 204, 304) and (16, 116, 216, 316), pressure control means (8, 17, 117, 208, 317) being arranged in the container (2, 102, 202, 302) for controlling during use the pressure of propellant flowing from the second compartment (16, 116, 216, 316), into the first compartment (4, 104, 204, 304), while in the second compartment (16, 116, 216, 316) fillers are provided for absorbing and/or adsorbing at least a part of the propellant. The fluid (3) to be dispensed is a carbonated beverage and the propellant contains at least carbon dioxide (COi2), while the fillers (20) comprise at least activated carbon. The pressure control means (8, 17, 117, 208, 317) is arranged for providing and maintaining during use a balanced pressure state in the uppermost space of the first compartment (4, 104, 204, 304). The invention further relates to a method for keeping a fluid under pressure and dispensing said fluid, wherein the fluid is included in a container (2, 102, 202, 302), wherein a propellant is stored under relatively high pressure in a first compartment (4, 104, 204, 304), wherein the compartment is brought into communication with the container (2, 102, 202, 302), such that with the aid of the propellant the fluid is pressurized and so maintained and can be dispensed via dispensing means, wherein prior to the introduction of the propellant into a second compartment (16, 116, 216, 316) a filler (20) is introduced into that compartment which filler can absorb and/or adsorb at least a part of the propellant, such that an amount of propellant is introduced into the second compartment (16, 116, 216, 316) at a pressure which is considerably lower than the pressure that would arise in the same compartment with the same amount of propellant and under the same external conditions if the filler (20) had not been included therein. Both the carbonated beverage and propellant are introduced into the second compartment (16, 116, 216, 316) under a pressure of between 0.4 and 1.4 MPa, as measured at application temperature, while using pressure control means (8, 17, 117, 208, 317) the propellant, as the fluid (3) is dispensed via the dispensing means, is dispensed at a pressure such that in the container (2, 102, 202, 302) a residual pressure is maintained for keeping a balanced state in the uppermost space thereof during use. The invention also relates to a pressure cartridge comprising a filler (20) of carbon, in particular activated carbon fibers capable of adsorbing and/or absorbing a propellant, in particular pure carbon dioxide, and comprising connecting means for bringing the pressure cartridge into fluid communication with a first compartment (4, 104, 204, 304) in a container (2, 102, 202, 302), for passing at least a part of the propellant into a fluid present in the container (2, 102, 202, 302).